On the left sidebar in iTunes, click on 'iTunes Store' just underneath the 'STORE' header.

Once you are in the store, the easiest way is to search for the app, using the text search field in the upper right corner of the iTunes application.

Click the download button next to the app's icon.

Sync your device to your computer.

You can download our Android app from your Android device:

Launch the 'Play Store' app on your Android device.

Tap the Search icon in the menu bar.

Type 'SpiderOak' into the search field.

Tap the 'Download' button.

Advanced users who prefer to not use the Apple App Store or the Android Play Store can also directly download the binary or source code. You need to understand how to do that in order to use this option. Users not familiar with doing so are encouraged to use the easier options mentioned above.